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I am using a MSI K8T Neo2-FIR motherboard that uses the VIA K8T800 Pro chipset. Windows XP keeps crashing if I set the HT value to anything other than 200 (400,600,800 & 1000 all crash). I have no clue why this is so. With HT at 200 I am even able to overclock the 4400+ to 2.6 GHz (FSB=237/Async mode:DDR400=>DDR333) at stock voltages without effort and stock air cooling. I did some SiSandra benchmarks that shows performance to be consistent with overclocking.
Why is HT > 200 causing crashes on my setup? Am I losing a lot by keeping the HT value at 200?
Specs:
X2 4400+
MSI K8T Neo2-FIR
4*512Mb OCZ Premier 2.5-3-3-7-2T
ATI AIW 9600XT
WD 250GB JB
450w Power supply
Addendum: I am using stock voltages/values across the board. Only thing I change for overclocking is FSB (=237), Memory Divider (DDR333) and Memory Timings (2-3-3-6-2T) to get 2.61 GHz at stock voltage, stock cooling, stock memory voltage, AGP=66, C'nQ disabled.
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?Eh?
Don't quite follow you?
What are you changing to get your overclock?Maybe you need to change the HT multi to 4?
Tt Lanfire
MSI K8N Diamond
3000+'Venice'@294x9x3 1:1
1GB PC3200
OCZ Powerstream 520w
6600GT
WDCaviar 160gb sata x2;~}
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I am using the lastest official Bios v9.2 for the board.
There is no multiplier option in the bios. Only something called HT which I assume is similiar to HT Multipler applied. Here is a screen shot of that exact page in bios.
http://www.geocities.com/vvume_inq/Bios.gif
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Addendum: Just to be clear any HT value > 200 causes XP to crash (even during xp installation) with or without overclocking.
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The HT Frequency (HyperTransport bus) is the product of the CPU Frequency & the HT multiplier. Your HT bus is supposed to be 1000MHz (200MHz x 5). When overclocking the CPU, you should keep the HT bus at or close to 1000MHz...to do that, you need to lower the HT multi to 4x, that way you can increase the CPU freq to as high as 250MHz without over-overclocking the HT bus.
Find the HT multi setting in the BIOS...it may be called something different
This space for rent
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Hmmmm...I just had a look at your manual & didn't see an HT multi setting, just this:
"HT Frequency Select
This item allows you to select the Hyper Transfer frequency. Setting options:
[200Mhz], [400Mhz], [600Mhz], [800Mhz], [1000Mhz]"In that case, 200MHz would equate to 1x HT multi, 400MHz = 2x, 600MHz = 3x, 800MHz = 4x, 1000MHz = 5x
This space for rent
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Exactly. So if I don't overclock, I should be able to set 1000 or even 800/600 for my HT value. Unfortunately anything but 200 causes a crash. That is why I am stumped.
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Well it's pretty odd... You should be able to set the HT to 1000mhz, cause that's the bandwith of every athlon 64 system. I really don't know your mobo, but make sure it supports all you have installed on it, like the kind of ram, cpu, etc. It's an AGP mobo... are you sure it supports dual-core processors? You have quite a powerful processor comparing to the rest of your system.
Free
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Yup. My processor is several notches above the rest because I don't use any other component more intensively (no games, scientific programming/video encoding are my major tasks which really don't depend all that much on the video card).
My MB does officially support dual core cpus and have released bios specific to X2s.
Ironically my machine has been very stable at HT=200MHz. And it doesn't seem to have affected the performance dramatically (SiSandra benchmarks show excellent results). So I am probably going to stick with the hobbled HT value.
Btw, what is the logic behind having a HT value > FSB? After all the HT still has to wait for the FSB to send in data. I can possibly see it affecting inter-cpu/core communication since they happen over internal HTs, but not with the main memory. Can someone enlighten me?
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